#1612 - Prepare changelog for 1.2.9 release.

Author: odrotbohm

src/main/resources/changelog.txt

@@ -1,5 +1,18 @@
 Spring HATEOAS Changelog
 ========================
+
+Changes in version 1.2.9 (2021-09-16)
+----------------------------------------
+- #1617 - Upgrade to Jackson 2.11.4.
+- #1616 - Upgrade to Reactor 2020.0.11.
+- #1615 - Upgrade to Slf4j 1.7.32.
+- #1614 - Upgrade to Kotlin 1.4.32.
+- #1613 - Upgrade to Spring Framework 5.3.10.
+- #1611 - Avoid superfluous object creation in `Link.valueOf(…)`.
+- #1606 - Wrong nullability declarations for properties of `Link`.
+- #1604 - `@JsonIdentityInfo` not rendering correctly since Spring HATEOAS 1.1.2.
+- #1601 - Receiving duplicate key when bean property accessors collide.
+
 Changes in version 1.2.8 (2021-07-14)
 ----------------------------------------
 - #1578 - Upgrade to Reactor 2020.0.9.

src/test/java/org/springframework/hateoas/support/ChangelogCreator.java

@@ -38,7 +38,7 @@
  */
 class ChangelogCreator {
 
-	private static final int MILESTONE_ID = 72;
+	private static final int MILESTONE_ID = 73;
 	private static final String URI_TEMPLATE = "https://api.github.com/repos/spring-projects/spring-hateoas/issues?milestone={id}&state=closed";
 
 	public static void main(String... args) {